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sAc42755BLn, sAc72775BLn    Issue: 2 - 22/02/12

Original Language Version

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WaRNiNg! Ensure that you have read, understood and apply Section 1 safety instructions.

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iMPORtaNt!  

the use of extension leads to connect these compressors to the mains is not recommended as the resulting voltage    

 

drop reduces motor, and therefore pump performance which may cause damage to your compressor.

NOtE: 

take care when selecting tools for use with the compressor. Air tool manufacturers normally express the volume of air required to  

 

 

operate a tool in cubic feet per minute (cfm). this refers to free air delivered by the compressor (air out) which varies according to the  

 

pressure setting. Do not confuse this with the compressor displacement which is the air taken in by the compressor (air in). ‘Air out’ is  

 

always less than ‘air in’ due to losses within the compressor.

4.1. 

StaRtiNg thE COMPRESSOR

 

check that the off switch (fig.4) is pushed in (the off position). to turn the compressor on, plug mains lead into mains supply,  

 

 

press the "on" button on the front panel (fig.4). 

4.2.

 

When starting the compressor for the first time, leave it running with no air tools connected to the air outlet. make sure that  pressure in  

 

the tank rises and that the compressor stops automatically when the maximum pressure value allowed  (written on the plate and  

 

 

shown on the gauge in fig.4) is achieved. the compressor will now operate automatically. the pressure switch stops the motor when   

 

the maximum tank pressure is reached and restarts it when the pressure falls below the minimum threshold - approx. 2bar (29psi)    

 

less than the maximum pressure. 

4.3.

 

stop the compressor by pressing the off switch in (fig.4). the compressed air inside the compressor head will flow out, making the   

 

restart easier and preventing the motor from being damaged. 

 

dO NOt, 

other than in an emergency

,

 stop the compressor by switching off the mains power, or by pulling the plug out, as the  

 

 

pressure relief will not then operate and motor damage may result upon restart.

 

When the compressor runs correctly and is stopped correctly there will be:

 

(a)

 a whistle of compressed air when the motor stops.

 

(b)

 a protracted whistle (about 20-25 seconds) when the compressor starts with no pressure in the tank.

NOtE: 

If the motor does not cut in and out, but runs continuously when using an air appliance, the capacity of the compressor may be too    

 

small for the equipment or tool.

 

the gauge (fig.4) indicates the pressure inside the main tank, not the pressure supplied to the air equipment. should the pressure in  

 

the main tank exceed the pre-set switch maximum, a safety valve will activate.

 

WaRNiNg!

 

for this reason dO NOT tamper with, or adjust, the switch or safety valve. 

4.  OPERatiON  

fig.1

fig.4

fig.2

fig.3

fig.5

Summary of Contents for SAC42755BLN

Page 1: ...Act 1974 makes owners of electrical appliances responsible for the safe condition of the appliance and the safety of the appliance operator If in any doubt about electrical safety contact a qualified electrician 1 1 3 Ensure that all insulation on the cables and the appliance itself is safe before connecting to mains power supply 1 1 4 Ensure that cables are always protected against short circuit ...

Page 2: ...essor ensure it is unplugged from the mains supply and that the air tank pressure has been vented 3 Maintain the compressor in good condition and replace any damaged or worn parts Use genuine parts only Unauthorised parts may be dangerous and will invalidate your warranty 3 Read the instructions regarding any accessory used with the compressor Ensure the safe working pressure of any air appliance ...

Page 3: ...m pressure value allowed written on the plate and shown on the gauge in fig 4 is achieved The compressor will now operate automatically The pressure switch stops the motor when the maximum tank pressure is reached and restarts it when the pressure falls below the minimum threshold approx 2bar 29psi less than the maximum pressure 4 3 Stop the compressor by pressing the OFF switch in fig 4 The compr...

Page 4: ...d the automatic cut in at 2bar below 5 5 Operations to be carried out every 500 hours a Replace the lubricating oil For oil specifications see 5 6 Remove the top cover 4 bolts and the side cover 4 bolts Remove the dipstick breather plug then unscrew the oil drain plug figs 2 3 drain the oil into a container If possible drain when the compressor is hot so that oil drains rapidly and completely Repl...

Page 5: ...nnections showing leaks If problem persists contact Authorised Service Agent Pressure switch valve leaks when compressor is idle Non return valve seal defective Discharge all tank pressure Referring to fig 8 unscrew valve cap A Clean rubber disc B and its seat Refit all parts accurately Compressor stops and does not restart Power failure Motor failure Check electricity supply and fuse Contact Auth...

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